Samuel Tobias

824 total citations
28 papers, 585 citations indexed

About

Samuel Tobias is a scholar working on Toxicology, Public Health, Environmental and Occupational Health and Pharmacology. According to data from OpenAlex, Samuel Tobias has authored 28 papers receiving a total of 585 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Toxicology, 21 papers in Public Health, Environmental and Occupational Health and 10 papers in Pharmacology. Recurrent topics in Samuel Tobias's work include Forensic Toxicology and Drug Analysis (20 papers), Opioid Use Disorder Treatment (19 papers) and Cannabis and Cannabinoid Research (8 papers). Samuel Tobias is often cited by papers focused on Forensic Toxicology and Drug Analysis (20 papers), Opioid Use Disorder Treatment (19 papers) and Cannabis and Cannabinoid Research (8 papers). Samuel Tobias collaborates with scholars based in Canada, United States and United Kingdom. Samuel Tobias's co-authors include Lianping Ti, Mark Lysyshyn, Aaron M. Shapiro, Evan Wood, Karen McCrae, Kenneth W. Tupper, Jaime Arredondo, M. Eugenia Socías, Cameron Grant and Georgina E. Meakin and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and American Journal of Epidemiology.

In The Last Decade

Samuel Tobias

24 papers receiving 572 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Samuel Tobias Canada 14 341 326 203 100 58 28 585
Karen McCrae Canada 9 340 1.0× 272 0.8× 241 1.2× 87 0.9× 28 0.5× 9 485
Matthew Juhascik United States 12 302 0.9× 315 1.0× 125 0.6× 53 0.5× 47 0.8× 18 556
Aaron M. Shapiro Canada 11 170 0.5× 149 0.5× 99 0.5× 53 0.5× 61 1.1× 18 371
Jane Mounteney Portugal 15 231 0.7× 249 0.8× 249 1.2× 113 1.1× 34 0.6× 27 654
Kraig E. Strayer United States 9 176 0.5× 171 0.5× 68 0.3× 23 0.2× 47 0.8× 11 376
Michael Gilbert United States 10 519 1.5× 164 0.5× 314 1.5× 52 0.5× 25 0.4× 21 713
Michael Evans‐Brown Portugal 13 107 0.3× 353 1.1× 109 0.5× 162 1.6× 99 1.7× 28 700
Nazlee Maghsoudi Canada 10 223 0.7× 160 0.5× 185 0.9× 78 0.8× 15 0.3× 15 396
Céline Eiden France 16 166 0.5× 283 0.9× 218 1.1× 158 1.6× 42 0.7× 66 726
Rachel Christie United Kingdom 11 67 0.2× 320 1.0× 96 0.5× 114 1.1× 170 2.9× 25 540

Countries citing papers authored by Samuel Tobias

Since Specialization
Citations

This map shows the geographic impact of Samuel Tobias's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Samuel Tobias with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Samuel Tobias more than expected).

Fields of papers citing papers by Samuel Tobias

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Samuel Tobias. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Samuel Tobias. The network helps show where Samuel Tobias may publish in the future.

Co-authorship network of co-authors of Samuel Tobias

This figure shows the co-authorship network connecting the top 25 collaborators of Samuel Tobias. A scholar is included among the top collaborators of Samuel Tobias based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Samuel Tobias. Samuel Tobias is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
Tobias, Samuel, et al.. (2025). Novel adulterants in unregulated opioids and their associations with adverse events. Canadian Journal of Public Health. 116(3). 356–363. 1 indexed citations
3.
Tobias, Samuel, Cameron Grant, Mark Lysyshyn, et al.. (2025). Sharing drug checking results in a Canadian setting: a multi-site analysis. International Journal of Drug Policy. 143. 104903–104903.
4.
Palis, Heather, Samuel Tobias, Lisa Liu, et al.. (2024). Factors associated with obtaining prescribed safer supply among people accessing harm reduction services: findings from a cross-sectional survey. Harm Reduction Journal. 21(1). 5–5. 5 indexed citations
5.
Tobias, Samuel, Mark Lysyshyn, Jane A. Buxton, et al.. (2023). What impact did the COVID-19 pandemic have on the variability of fentanyl concentrations in the Vancouver, Canada illicit drug supply? An interrupted time-series analysis. SHILAP Revista de lepidopterología. 1(1). e000197–e000197. 8 indexed citations
6.
Tobias, Samuel, et al.. (2023). Responding to changes in the unregulated drug supply: the need for a dynamic approach to drug checking technologies. The American Journal of Drug and Alcohol Abuse. 49(6). 685–690. 16 indexed citations
7.
Tobias, Samuel, Heather Palis, Charlene Burmeister, et al.. (2023). Motivators of and barriers to drug checking engagement in British Columbia, Canada: Findings from a cross-sectional study. International Journal of Drug Policy. 123. 104290–104290. 6 indexed citations
8.
Dong, Huiru, Samuel Tobias, Jane A. Buxton, et al.. (2023). Fentanyl Concentration in Drug Checking Samples and Risk of Overdose Death in Vancouver, Canada. American Journal of Preventive Medicine. 66(1). 10–17. 14 indexed citations
9.
Ti, Lianping, et al.. (2023). Development of a neural network model to predict the presence of fentanyl in community drug samples. PLoS ONE. 18(7). e0288656–e0288656. 3 indexed citations
10.
11.
Socías, M. Eugenia, et al.. (2022). Examining fentanyl and its analogues in the unregulated drug supply of British Columbia, Canada using drug checking technologies. Drug and Alcohol Review. 42(3). 538–543. 13 indexed citations
12.
Wood, Evan, et al.. (2021). Is expected substance type associated with timing of drug checking service utilization?: A cross-sectional study. Harm Reduction Journal. 18(1). 66–66. 13 indexed citations
13.
14.
Tobias, Samuel, et al.. (2021). Results from a mobile drug checking pilot program using three technologies in Chicago, IL, USA. Drug and Alcohol Dependence. 228. 108976–108976. 39 indexed citations
15.
McCrae, Karen, Evan Wood, Mark Lysyshyn, et al.. (2021). The Utility of Visual Appearance in Predicting the Composition of Street Opioids. Substance Abuse. 42(4). 775–779. 11 indexed citations
16.
Ti, Lianping, Samuel Tobias, Nazlee Maghsoudi, et al.. (2020). Detection of synthetic cannabinoid adulteration in the unregulated drug supply in three Canadian settings. Drug and Alcohol Review. 40(4). 580–585. 19 indexed citations
17.
Tobias, Samuel, et al.. (2020). Drug checking identifies counterfeit alprazolam tablets. Drug and Alcohol Dependence. 218. 108300–108300. 43 indexed citations
18.
Ti, Lianping, Samuel Tobias, Mark Lysyshyn, et al.. (2020). Detecting fentanyl using point-of-care drug checking technologies: A validation study. Drug and Alcohol Dependence. 212. 108006–108006. 57 indexed citations
19.
McCrae, Karen, Samuel Tobias, Cameron Grant, et al.. (2019). Assessing the limit of detection of Fourier‐transform infrared spectroscopy and immunoassay strips for fentanyl in a real‐world setting. Drug and Alcohol Review. 39(1). 98–102. 72 indexed citations
20.
Tobias, Samuel, et al.. (2017). The effect of pressure on DNA deposition by touch. Forensic science international. Genetics supplement series. 6. e12–e14. 37 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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